02507nam a2200241 a 4500 vtls000058146 KUKTEM 20251114204511.0 120105t2010 my a f m 000 0 eng d THE0004565(Local) 201905141119 azhar 201201051441 ida UMP TP350 .A99 2010 rs Bc. Azza Nurain Kairallah The effect of vacuum pressure on the flammability limits of H2 enrichment in natural gas (NG) / Azza Nurain Kairallah Kuantan, Pahang : UMP, 2010 xiv, 63 p. : ill. ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Chemical Engineering (Gas Technology)) -- Universiti Malaysia Pahang - 2010 Bibliography : p. 48-50 Hydrogen- enriched natural gas has been widely used in all over the world for application in gas turbine and internal combustion engine. The theory behind this concept is the addition of hydrogen in natural gas can extend the lean operation limit, improve the lean burn ability, and decrease the emission of NOx, CO and unburned hydrocarbon. The aims of this study are to determine the effect of vacuum pressures on the flammability limits of hydrogen enrichment in natural gas. In this experiment, methane is use to replace the natural gas. The experiments were performed in a 20 L closed explosion vessel. The mixtures were ignited by using spark permanent wire that placed at the centre of the vessel. The explosion pressure data is used to determine the flammability limits, when the low pressure is used in the explosion, the explosion limit will become wide. In this study, the result shows the flammability limits of methane is from 5 % volume to 15 % volume of methane and have revealed that the addition of hydrogen in methane /air mixture will reduce the lower flammability limit initially at 5 % volume to 1 % volume of methane at 0.98 bar. As the conclusion, we can come out that explosion of methane at lower pressure with addition of hydrogen has proven benefit of widen the flammability limit of methane, improving the combustion stability, reduce the emission of NOx, CO and unburned hydrocarbon and decreasing the spark timing. Hence, the cold start phenomenon that usually occurs at the initial stage of combustion could be overcome by adding hydrogen at low pressure. Natural gas Flammability 0 0 0 1 10000 10000 2019-09-04 0 TP350 .A99 2010 rs Bc. 0000060833 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 10000 10000 2019-09-04 0 CD 5582 | TP350 .A99 2010 rs Bc. 0000060834 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 3104 3110 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*9992